1997

6.6

2006

7.2

2016

6.2

2023

6.0

1962

5.4

1979

7.3

1936

8.3

2002

6.2

2007

7.4

1977

10.0

2007

5.8

1964

5.0

2008

7.6

1996

6.5

1968

7.2

1973

6.9

2006

6.6

1998

6.8

2016

7.1

1980

8.1